US2526776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of hydrogen fluoride and silicon tetrafluoride from gases
Assignee: Honeywell International Inc
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Filing: 1948-10-19
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Granted: 1950-10-24
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Expires: 1968-10-19
Abstract
No abstract record available.
Inventors
- 👤 Lee B Smith
- 👤 John D Calfee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:20
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE PROCESS FOR REDUCING THE FLUORINE CONTENT OF A GAS STREAM CONTAINING BY VOLUME A MA JOR PORTION OF HCI AND, AS FLUROINE COMPOUND IMPURITY, MATERIAL OF THE GROUP CONSISTING OF HF, SIF4 AND MIXTURES THEREOF, WHICH PROCESS COMPRISES PASSING SAID GAS STREAM, WHILE WHOLLY IN THE GAS PHASE AND AT TEMPERATURE NOT MORE THAN 70*C., THRU A BODY OF FULLER''S EARTH, AND REGULATING THE RATE OF PASSAGE OF SAID GAS STREAM THRU SAID BODY SO AS TO REDUCE THE FLUORINE CONTENT OF SAID STREAM TO EQUIAVALENT TO NOT MORE THAN 0.006% BY VOLUME OF HF.
Claim 2
Dependent Claim
96 words
THE PROCESS FOR REDUCING THE FLUORINE CONTENT OF A GAS STREAM CONTAINING BY VOLUME A MA JOR PORTION OF HCI AND, AS FLUROINE COMPOUND IMPURITY, MATERIAL OF THE GROUP CONSISTING OF HF, SIF4 AND MIXTURES THEREOF, WHICH PROCESS COMPRISES PASSING SAID GAS STREAM, WHILE WHOLLY IN THE GAS PHASE AND AT TEMPERATURE NOT MORE THAN 70*C., THRU A BODY OF FULLER''S EARTH, AND REGULATING THE RATE OF PASSAGE OF SAID GAS STREAM THRU SAID BODY SO AS TO REDUCE THE FLUORINE CONTENT OF SAID STREAM TO EQUIAVALENT TO NOT MORE THAN 0.006% BY VOLUME OF HF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |